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Search: Posts Made By: Dr Sardonicus
Forum: Lounge 2020-10-24, 20:52
Replies: 134
Views: 11,041
Posted By Dr Sardonicus
Hmm. "Pyrrhocorax" apparently means...

Hmm. "Pyrrhocorax" apparently means "Flame-colored beak." Perhaps their high-pitched voices indicate they need chough medicine.


Actually, starlings were introduced to the US in the 1890's....
Forum: Prime Gap Searches 2020-10-24, 01:24
Replies: 96
Views: 10,658
Posted By Dr Sardonicus
Hmm. You can use \; to insert white space. The...

Hmm. You can use \; to insert white space. The pound or hashtag sign, I could find no good remedy.

I tried \# wrapped in tex tags. "Preview post" got me a message:

\#

In case that didn't...
Forum: Lounge 2020-10-24, 00:28
Replies: 47
Views: 2,564
Posted By Dr Sardonicus
Washington state discovers first 'murder hornet'...

Washington state discovers first 'murder hornet' nest in US (https://apnews.com/article/washington-first-murder-hornet-discovery-0cbf9cccf5a4a62902aa880c87629172)

In other insect news, the two...
Forum: Puzzles 2020-10-23, 19:07
Replies: 25
Views: 563
Posted By Dr Sardonicus
Hmm. Looking at it now, I guess it is. Never...

Hmm. Looking at it now, I guess it is. Never occurred to me before. Fascinating. So, that's a helmet on the head.

So the figure is wearing a helmet and holding a torch. Interesting...
Forum: Number Theory Discussion Group 2020-10-23, 18:46
Replies: 19
Views: 445
Posted By Dr Sardonicus
There is an "admissibility condition" to the...

There is an "admissibility condition" to the effect that there can be no inevitable prime factor.

To check this, I told Pari-GP to compute the degree-447 polynomial

f =...
Forum: Puzzles 2020-10-23, 13:18
Replies: 25
Views: 563
Posted By Dr Sardonicus
The oil lamp may also symbolize learning or...

The oil lamp may also symbolize learning or education.

The lightning bolt may symbolize sudden realization, or sudden banishment of ignorance.

Balance scales -- justice, equality, etc as...
Forum: Number Theory Discussion Group 2020-10-23, 12:37
Replies: 19
Views: 445
Posted By Dr Sardonicus
Question Sequence of 3159 numbers containing 447 primes

By 53#? I don't know where in the world you got that idea.
Forum: ONeil 2020-10-23, 12:28
Replies: 26
Views: 340
Posted By Dr Sardonicus
Respective k<6*p+1 when p=1 (mod 4)[/QUOTE] ...

Respective k<6*p+1 when p=1 (mod 4)[/QUOTE]
:tu:
Forum: ONeil 2020-10-23, 11:56
Replies: 26
Views: 340
Posted By Dr Sardonicus
This works with only k=1, thus if it divides...

This works with only k=1, thus if it divides 2p-1, it is definitely a prime factor.[/QUOTE]Actually, it's true for more than just k = 1.

Let p > 2 be prime. The smallest conceivable composite...
Forum: Number Theory Discussion Group 2020-10-23, 00:26
Replies: 19
Views: 445
Posted By Dr Sardonicus
Once upon a time, long long ago, I posted a link...

Once upon a time, long long ago, I posted a link to a paper discussing this, Prime Number Races (https://dms.umontreal.ca/~andrew/PDF/PrimeRace.pdf).
Forum: Puzzles 2020-10-22, 23:49
Replies: 25
Views: 563
Posted By Dr Sardonicus
Starting at the upper left, and proceeding...

Starting at the upper left, and proceeding clockwise around the perimeter, there are a number of objects with possibly symbolic meanings.

An oil lamp.
Lightning bolt (?)
Scales
Shield...
Forum: Science & Technology 2020-10-22, 16:41
Replies: 30
Views: 1,859
Posted By Dr Sardonicus
Unfortunately, the previous poster failed to...

Unfortunately, the previous poster failed to emphasize the main problem:

It seems that drifting is the snow issue. The old station was buried under so much snow, it was ordered sealed because...
Forum: Lounge 2020-10-22, 16:10
Replies: 1,508
RIP
Views: 102,694
Posted By Dr Sardonicus
Harry Houdini and Sherlock Holmes creator Arthur...

Harry Houdini and Sherlock Holmes creator Arthur Conan Doyle became friends, but Doyle was a Spiritualist, and their friendship ended over Houdini's campaign against phony Spiritualist mediums.
...
Forum: Number Theory Discussion Group 2020-10-22, 15:34
Replies: 19
Views: 445
Posted By Dr Sardonicus
K-TUPLE Permissible Patterns...

K-TUPLE Permissible Patterns (http://www.opertech.com/primes/k-tuples.html)
Forum: Lounge 2020-10-22, 15:01
Replies: 1,508
RIP
Views: 102,694
Posted By Dr Sardonicus
Would a fraudster setting up a GoFundMe page for...

Would a fraudster setting up a GoFundMe page for his funeral expenses do?
Forum: Lounge 2020-10-22, 12:45
Replies: 1,311
Views: 71,237
Posted By Dr Sardonicus
<snip>[/QUOTE]Perhaps he hasn't tried fermented...

<snip>[/QUOTE]Perhaps he hasn't tried fermented Greenland shark, Kæster Hákarl (https://allthatsinteresting.com/hakarl)

This delicacy was brought to my attention by a cook book I received as a...
Forum: Puzzles 2020-10-22, 11:37
Replies: 6
Views: 184
Posted By Dr Sardonicus
Yes, substituting x for 7! does make things much...

Yes, substituting x for 7! does make things much easier to handle. The obvious regrouping of the first part of the expression gives
...
Forum: jwaltos 2020-10-22, 11:15
Replies: 2
Views: 77
Posted By Dr Sardonicus
According to the Mathematics Genealogy Project...

According to the Mathematics Genealogy Project (https://www.genealogy.math.ndsu.nodak.edu/id.php?id=69767), André Néron got his Ph.D. in 1952, and the title of his thesis is Problèmes arithmétique et...
Forum: Soap Box 2020-10-22, 00:09
Replies: 1,339
Views: 57,804
Posted By Dr Sardonicus
I will consider myself fortunate if this doesn't...

I will consider myself fortunate if this doesn't give me a fatal case of the dry heaves.[/QUOTE]Trump rape accuser 'stunned' at DOJ no-show at court hearing...
Forum: Soap Box 2020-10-21, 13:40
Replies: 341
Views: 19,822
Posted By Dr Sardonicus
[/QUOTE]Reminds me of an SF story, Something in...

[/QUOTE]Reminds me of an SF story, Something in the City (Novelette, author Colin Kapp, got the cover illustration of the November 1984 ANALOG).
Forum: Lounge 2020-10-21, 12:26
Replies: 73
Views: 1,775
Posted By Dr Sardonicus
Avocados can be poisonous to horses. Nasty stuff....

Avocados can be poisonous to horses. Nasty stuff.

https://ker.com/equinews/avocados-can-toxic-horses/[/QUOTE]Based on the xkcd "What if?..." A mole of moles (https://what-if.xkcd.com/4/), we have...
Forum: Lounge 2020-10-20, 14:30
Replies: 73
Views: 1,775
Posted By Dr Sardonicus
The (approximate) molecular weight of the...

The (approximate) molecular weight of the asphyxiant CO is 12 + 16 = 28, which is the same as the 14 + 14 of N2, which is by far the largest component of air. (The next-largest is oxygen, with a...
Forum: Lounge 2020-10-19, 23:27
Replies: 1,124
Views: 53,422
Posted By Dr Sardonicus
Speaking of ready-made scapegoats...

From a Monday call to campaign staff -- knowing members of the press were on the line -- as quoted, e.g. here...
Forum: Lounge 2020-10-19, 19:20
Replies: 134
Views: 11,041
Posted By Dr Sardonicus
Owl boards helicopter fighting California...

Owl boards helicopter fighting California wildfire (https://www.upi.com/Odd_News/2020/10/16/Owl-boards-helicopter-fighting-California-wildfire/9711602880111/)
...
Forum: Lounge 2020-10-19, 19:08
Replies: 1,311
Views: 71,237
Posted By Dr Sardonicus
I have no objection to eating roadkill. I was...

I have no objection to eating roadkill. I was merely pointing out that "road mortality" wasn't all that eco-friendly.

There is one caveat, at least here in the US. Some states require that, if...
Showing results 1 to 25 of 1000

 
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